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K&N Universal Air Filter, Round Straight, 76 mm Flange, 127 mm Diameter, 165 mm Height
The K&N RU-2820 is a universal straight (cylindrical) air filter with a 76 mm flange inside diameter, a 127 mm outside diameter and a height of 165 mm. Its cotton gauze media comes in several layers and is washable and reusable. The top is rubber and the pliable rubber flange sits in the center of the filter.
K&N says its universal air filters are designed for racing vehicles, radio-controlled cars, generators, snowmobiles, tractors and other applications.
Specifications
| Manufacturer part number | RU-2820 |
| Brand | K&N |
| Type | Round straight universal air filter |
| Series | High-Flow Original |
| Filter media | Cotton gauze in several layers, washable |
| Flange inside diameter | 76 mm (3 in) |
| Flange length | 16 mm (0.625 in) |
| Flange | One, centered, pliable rubber |
| Outside diameter | 127 mm (5 in) |
| Height | 165 mm (6.5 in) |
| Top | Rubber |
| Re-oiling amount | 34 ml |
| Package contents | 1 air filter |
| Filtration efficiency (K&N) | Up to 99% |
Choosing the size
- The 76 mm figure is the inside diameter of the pliable rubber flange, which can stretch by up to 1.5 mm for in-between sizes.
- It is a universal filter with no vehicle list (K&N shows no cross references for this part), so it is chosen by the diameter of the intake tube it is fitted on.
- The filter is 127 mm in outside diameter and 165 mm tall.
- The K&N package lists one air filter only. A clamp is not mentioned in the package, so it is ordered separately.
Care
- The filter is washable and reusable, and K&N supplies it pre-oiled and ready for use.
- For re-oiling, K&N specifies 34 ml of air filter oil.
More universal air filters: sport air filters